+move

2026-04-29 10:24:42 +00:00
parent 56a8bfa766
commit fe740da06b
4 changed files with 323 additions and 0 deletions
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+"""QR/Barcode scanner using pyzbar + OpenCV for Raspberry Pi Camera Module v3."""
+
+import cv2
+from pyzbar import pyzbar
+import time
+
+
+def main():
+    # Camera Module v3 uses libcamera (not V4L2 by default)
+    # GStreamer pipeline for libcamera
+    gst_pipeline = (
+        "libcamerasrc ! "
+        "video/x-raw, format=NV12, width=1280, height=960 ! "
+        "videoconvert ! "
+        "video/x-raw, format=BGR ! "
+        "appsink"
+    )
+
+    cap = cv2.VideoCapture(gst_pipeline, cv2.CAP_GSTREAMER)
+
+    if not cap.isOpened():
+        # Fallback: try V4L2 if libcamera pipeline fails
+        print("GStreamer pipeline failed, trying /dev/video0...")
+        cap = cv2.VideoCapture(0)
+        if not cap.isOpened():
+            print("Error: Cannot open camera")
+            return
+
+        cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
+        cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 960)
+
+    scanned_codes = set()
+
+    print("Scanner running. Press 'q' to quit, 'r' to reset scanned codes.")
+
+    try:
+        while True:
+            ret, frame = cap.read()
+            if not ret:
+                print("Failed to grab frame")
+                break
+
+            gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
+            codes = pyzbar.decode(gray)
+
+            for code in codes:
+                data = code.data.decode("utf-8")
+                code_type = code.type
+
+                if data not in scanned_codes:
+                    scanned_codes.add(data)
+                    print(f"[{code_type}] {data}  (total unique: {len(scanned_codes)})")
+
+                # Draw bounding box
+                points = code.polygon
+                if len(points) == 4:
+                    pts = [(p.x, p.y) for p in points]
+                    for i in range(4):
+                        cv2.line(frame, pts[i], pts[(i + 1) % 4], (0, 255, 0), 3)
+
+                # Draw data label
+                cv2.putText(
+                    frame,
+                    data[:40],
+                    (points[0].x, points[0].y - 10),
+                    cv2.FONT_HERSHEY_SIMPLEX,
+                    0.5,
+                    (0, 255, 0),
+                    2,
+                )
+
+            cv2.imshow("Scanner", frame)
+
+            key = cv2.waitKey(1) & 0xFF
+            if key == ord("q"):
+                break
+            elif key == ord("r"):
+                scanned_codes.clear()
+                print("Scanned codes reset.")
+
+    except KeyboardInterrupt:
+        pass
+    finally:
+        cap.release()
+        cv2.destroyAllWindows()
+
+
+if __name__ == "__main__":
+    main()